Getting a window into the world of the culture(s) in the Orkney who lived there, who lived and died there could change everything we have believed about the human race. There's so much to gain.
Maybe the answer will arrive in the ways of testing which might be developed. Do you think it's possible any group might excavate the area? I have read that a few artifacts have been discovered fairly recently in the area between the UK and Europe on the ocean floor.
You have definitely awakened a deep interest, informing people of your visits there and your ongoing personal study. Please do let us know if you are planning a new visit, etc. Clearly you're the one this forum will remember time after time, germamba!
Have a great week ahead. 
(Can't imagine how long it would take to have constructed the image to include in your message in the bottle! Great idea.)
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